These Chords are very akward and partially hard, but you can actually play these to
the song (the versions with Am or Em or so in the beginning won't work or didn't
for me). In the bridge i've written "C" and then "C(+1) and "C(+3)". This means
that you just slide the C chord (01023) 1 and later 3 chords up.
so C(+1) is 02034 and C(+3) is 04056.
When you can play this version perfectly you can proceed to this tab version:
http://tabs.ultimate-guitar.com/n/nancy_sinatra/bang_bang_ver4_tab.htm
*****************************************************************************
Standart Tuning
(I get the sound using a reverb and a phaser effect)

    Intro
    Fm              Bbm            C7                Fm
e|----------------------------------0-------------------------1--|
B|--1-----1---------2-----2-1-------1-----2-1---------------1----|
G|------1---3---1---3---3-------3---3---------3-1-0-------1------|
D|----3-------------3-3-------------2---2---------------3--------|
A|----------------------------------3-3---------------3----------|
E|--------------------------------------------------1------------|
                                                            I was
    Verse
                          C7            Eb
five and he was six, we rode on horses made of sticks.
Eb                                C
   He wore black and I wore white. He would always win the fight

    Chorus
        (Cm) Fm                    (Cm) Fm                     
Bang bang. He shot me down, bang bang. I hit the ground,
             Eb                        C7
bang bang. That awful sound, Bang bang. My baby shot me
[Intro]
down.

    Verse 2                                                        
                E                 Eb               D
Seasons came and changed the time. When I grew up I called him mine.
Eb                                C7
   He would always laugh and say,"Remember when we used to play

    Chorus 2
        (Cm) Fm                     (Cm) Fm             
bang bang?" I shot you down, bang bang. You hit the ground,
             Eb                        C7
bang bang. That awful sound, bang bang. I used to shoot you
[Intro]
down.

    Bridge
                                 [ch]Fm/Eb[/ch]
    Music played and people sang.     Just for me the church bells rang.
    C#  C# C#  Eb      C#   Eb C#  Eb       C C(+1) C(+3) C(+1)  C
e|---------------------------------------------------------------0--| 
B|------------------------------6-----------1---2-----4-----2----1--|   
G|--6---6---6---8-------6---8---6---6-------0---0-----0-----0----0--|   
D|--6---6---6---6-------6---6---6---6-------2---3-----5-----3----2--|  
A|--8---8---------------8-------8-----------------------------------|
E|------------------------------------------------------------------|

    Verse 3
Fm                   E            Eb              D
   Now he's gone, I don't know why, and 'til this day sometimes I cry.
Eb                                C7
   He didn't even say goodbye, he didn't take the time to lie.

    Chorus 3
        (Cm) Fm                     (Cm) Fm             
Bang bang. He shot me down, bang bang. I hit the ground,
             Eb                        C7
bang bang. That awful sound, bang bang. My baby shot me
[Intro]
down.